tag:blogger.com,1999:blog-14862578600830542232024-03-14T01:08:46.911-07:00My class reflectionAdrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-1486257860083054223.post-80258267132943891102012-06-03T10:02:00.002-07:002012-06-03T10:02:44.565-07:00Week 8 -The last lecturer- internet ^^<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">Well, its a roller coaster ride for this semester and without i even noticing it, it's already the last lecturer for the telecommunication course. Mixed emotion arise in my mind when I enter the class; happy as we finally complete this course but feel pressurize as the final exam is just around the corner. Back to the main point though, today we learn about internet . For me, internet is a essential part of my life especially after i enter UTM as it is my main medium of entertainment and relaxation. I always though internet as a mean of getting information and data globally. </span><br />
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3;">Internet is actually defined as </span><span style="background-color: #cfe2f3; line-height: 19px;">The </span><b style="background-color: yellow; line-height: 19px;">Internet</b><span style="background-color: #cfe2f3; line-height: 19px;"> is a global system of interconnected </span><span style="background-color: #cfe2f3;">computer networks</span><span style="background-color: #cfe2f3; line-height: 19px;"> that use the standard </span><span style="background-color: #cfe2f3;">Internet protocol suite</span><span style="background-color: #cfe2f3; line-height: 19px;"> (often called TCP/IP, although not all applications use TCP) to serve billions of users worldwide.</span></span><br />
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3;">The </span><b><span style="background-color: yellow;">Internet protocol </span><span style="background-color: #cfe2f3;">suite</span></b><span style="background-color: #cfe2f3;"> is the set of communications protocols used for the Internet and similar networks, and generally the most popularprotocol stack for wide area networks. It is commonly known as </span><b style="background-color: #cfe2f3;">TCP/IP</b><span style="background-color: #cfe2f3;">, because of its most important protocols: Transmission Control Protocol(TCP) and Internet Protocol (IP), which were the first networking protocols defined in this standard. It </span></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: Times, 'Times New Roman', serif;"><span style="line-height: 19px;">TCP/IP provides </span><span style="line-height: 19px;">end-to-end connectivity</span><span style="line-height: 19px;"> specifying how data should be formatted, addressed, transmitted, </span>routed<span style="line-height: 19px;"> and received at the destination. It has four abstraction layers, each with its own protocols. There is a arrangement/ hierarchy for the connection to internet; from single computer to LAN ( local area network) to ISP to WWW ( world wide web ) </span></span><span style="color: #333333; font-family: Philosopher; line-height: 27px;">We just need </span><span style="font-family: Philosopher; line-height: 27px;">computer</span><span style="font-family: Philosopher; line-height: 27px;">, </span><span style="font-family: Philosopher; line-height: 27px;">web browser </span><span style="font-family: Philosopher; line-height: 27px;">and </span><span style="font-family: Philosopher; line-height: 27px;">internet access </span><span style="font-family: Philosopher; line-height: 27px;">to connect ourselves to the internet.</span><span style="font-family: Times, 'Times New Roman', serif;"><span style="line-height: 19px;">A </span><b style="line-height: 19px;">web browser</b><span style="line-height: 19px;"> is a </span>software application<span style="line-height: 19px;"> for retrieving, presenting, and traversing information resources on the </span>World Wide Web.</span></span></div>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; line-height: 19px;">An </span><span style="background-color: yellow;"><b style="line-height: 19px;">Internet Protocol address</b><span style="line-height: 19px;"> (</span><b style="line-height: 19px;">IP address</b></span><span style="line-height: 19px;"><span style="background-color: yellow;">)</span><span style="background-color: #cfe2f3;"> is a numerical label assigned to each device (e.g., computer, printer) participating in a </span></span><span style="background-color: #cfe2f3;">computer network</span><span style="background-color: #cfe2f3; line-height: 19px;"> that uses the </span><span style="background-color: #cfe2f3;">Internet Protocol</span><span style="background-color: #cfe2f3; line-height: 19px;"> for communication. T</span><span style="background-color: #cfe2f3; line-height: 19px;">he designers of the Internet Protocol defined an IP address as a </span><span style="background-color: #cfe2f3;">32-bit</span><span style="background-color: #cfe2f3; line-height: 19px;"> number. </span><span style="background-color: #cfe2f3; color: #333333; line-height: 27px;">An IP address consists of two parts, one identifying the network and one identifying the node or host. The Class of the address determines which part belongs to the network address and which part belongs to the node address. All nodes on a given network share the same network prefix but must have a unique host number.</span></span></div>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3;">An </span><span style="background-color: yellow;"><b>Internet service provider</b> (<b>ISP</b>) </span><span style="background-color: #cfe2f3;">is an organization that provides access to the Internet.</span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">Internet service providers can be either community-owned and non-profit, or privately owned and for-profit.</span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">Access ISPs directly connect clients to the Internet using copper wires, wireless or fiber-optic connections. Hosting ISPs lease server space for smaller businesses and other people (colocation). Transit ISPs provide large amounts of bandwidth for connecting <i>hosting ISPs</i> to <i>access ISPs.</i></span></div>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3;">The</span><span style="background-color: #cfe2f3; color: yellow;"> </span><span style="background-color: yellow;"><b>Hypertext Transfer Protocol</b> (<b>HTTP</b>)</span><span style="background-color: #cfe2f3;"> is an application protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web.</span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">Hypertext is a multi-linear set of objects, building a network by using logical links (the so called hyperlinks) between the nodes (e.g. text or words). HTTP is the protocol to exchange or transfer hypertext.</span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">Ok, i thinks that's all from me. Hopefully you all enjoy reading my blog. Thanks for the support ya ^^.</span></div>
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<span style="background-color: white; font-family: Philosopher; line-height: 27px;"><br /></span></div>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com1tag:blogger.com,1999:blog-1486257860083054223.post-69648511976239712012012-05-12T00:55:00.002-07:002012-05-12T01:02:35.350-07:00Week 7- continuation of Wireless Technology<span style="background-color: #cfe2f3;">T<span style="font-family: Times, 'Times New Roman', serif;">o</span></span><span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">day, Dr Dayang continue her lecture on Wireless Technology- that is <span style="color: red;">Bluetooth , Broadband </span>and<span style="color: red;"> Infrared. </span>Firstly, what is Bluetooth? Of coarse it is not tooth of <span style="color: blue;">blue color </span>^^</span><br />
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; color: red;">Bluetooth</span><span style="background-color: #cfe2f3;"> is a wireless radio technology,
based on an industry open standards set of specifications.</span><span style="line-height: 115%;"><span style="background-color: #cfe2f3;">The
name Bluetooth is borrowed from </span><span style="background-color: yellow;">Harald Bluetooth</span><span style="background-color: #cfe2f3;">, a king in Denmark more than
1,000 years ago</span></span><span style="background-color: #cfe2f3; line-height: 14.25pt;"> .The <span style="font-size: small;">Bluetooth
wireless protocol was designed to exchange data over short distances from fixed
and mobile devices, to create </span></span><span style="background-color: #cfe2f3; color: red; line-height: 14.25pt;">personal area networks (PANs</span><span style="background-color: #cfe2f3; line-height: 14.25pt;">) – also called
piconets. Up to seven Bluetooth devices can be used to create a </span><span style="background-color: #cfe2f3; color: red; line-height: 14.25pt;">piconet.</span></span></div>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="font-size: small;"><span style="line-height: 14.25pt;"><span style="background-color: #cfe2f3;">The </span><span style="background-color: yellow;">key features</span><span style="background-color: #cfe2f3;"> of </span></span></span><span style="background-color: #cfe2f3; line-height: 19px;">Bluetooth</span><span style="background-color: #cfe2f3; font-size: small;"><span style="line-height: 14.25pt;"> </span><span style="line-height: 19px;">technology</span><span style="line-height: 14.25pt;"> are <span style="color: red;">robustness,
low power</span>, and <span style="color: red;">low cost</span>, and the fact that it has become a universal standard
for exchanging data amongst a range of fixed and mobile devices. </span></span><span style="background-color: #cfe2f3; line-height: 14.25pt;">In addition, Bluetooth wireless technology has the ability to
<span style="color: red;">simultaneously handle both data and voice transmissions</span>. </span><span style="background-color: #cfe2f3; line-height: 14.25pt;">This means that users can use a </span><span style="background-color: #cfe2f3; color: red;">variety of applications</span><span style="background-color: #cfe2f3; line-height: 14.25pt;"> such as a
hands-free headset for voice calls, printing and fax capabilities, and
synchronizing PDAs, laptop, and </span><span style="background-color: #cfe2f3;">mobile phone applications</span><span style="background-color: #cfe2f3; line-height: 14.25pt;">.</span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;">The </span><span style="background-color: yellow; font-family: Times, 'Times New Roman', serif;">future of Bluetooth</span><span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"> looks strong, with initiatives underway
for <span style="color: red;">higher throughput,</span> <span style="color: red;">more ubiquitous usage and links </span>with Wifi and Ultra Wideband (UWB) broadcast
technology<span style="color: red;">.</span><span style="line-height: 14.25pt;"><span style="color: red;">Operating systems</span> such as the </span>Mac<span style="color: #74b6c9;"> </span>OS<span style="line-height: 14.25pt;"> and Windows continue to have
<span style="color: red;">native support for Bluetooth</span>.</span><span style="line-height: 14.25pt;">The Bluetooth SIG partners are working on enabling Bluetooth
information points, to <span style="color: red;">enable advertising models</span> based around users pulling
information from ‘information points’, rather than having to ‘push’ information
out.</span><span style="line-height: 14.25pt;">Other emerging features include <span style="color: red;">Bluetooth in cars; automatic
configuration of piconets; and quality of service (QoS) improvements</span>, for
example enabling audio and video data to be transmitted at a higher quality.</span></span></div>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; font-size: small;"><span style="line-height: 14.25pt;"> Next up is </span></span><span style="background-color: yellow; line-height: 19px;">broadband</span><span style="background-color: #cfe2f3; font-size: small;"><span style="line-height: 14.25pt;">. My </span><span style="line-height: 19px;">definition to broadband is that it is an easy way to surf the internet as it is portable to any computer device such as notebooks and laptop as long as the device got a USB cable in it. In fact, I am one of the user of broadband ^^.</span></span></span></div>
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<tr><td style="text-align: center;"><a href="http://2.bp.blogspot.com/-rPp0yWrrKgQ/T63q-BIAkZI/AAAAAAAAAG0/P4NX252hDek/s1600/wpid-110106-digi-day-broadband-50-main.jpg" imageanchor="1" style="background-color: #cfe2f3; margin-left: auto; margin-right: auto;"><span style="font-family: Times, 'Times New Roman', serif;"><img border="0" height="226" src="http://2.bp.blogspot.com/-rPp0yWrrKgQ/T63q-BIAkZI/AAAAAAAAAG0/P4NX252hDek/s400/wpid-110106-digi-day-broadband-50-main.jpg" width="400" /></span></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif; font-size: small;">My beloved gadget - digi broadband ^^</span></td></tr>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; line-height: 19px;">The term </span><i style="background-color: #cfe2f3; line-height: 19px;"><b><span style="color: red;">broadband</span></b></i><span style="line-height: 19px;"><span style="background-color: #cfe2f3;"> refers to a telecommunications signal or device of greater</span><span style="background-color: yellow;"> </span></span><span style="background-color: yellow;">bandwidth</span><span style="background-color: #cfe2f3; line-height: 19px;">, in some sense, than another standard or usual signal or device (and the broader the band, the greater the capacity for traffic).</span><span style="background-color: #cfe2f3; text-align: -webkit-left;"> </span><b style="background-color: #cfe2f3; text-align: -webkit-left;"> <i></i></b><span style="background-color: #cfe2f3; text-align: -webkit-left;">Broadband refers to telecommunication that provides </span><span style="background-color: yellow;"><span style="text-align: -webkit-left;">multiple channels of data over a single communications </span><b style="text-align: -webkit-left;">medium</b></span><span style="background-color: #cfe2f3; text-align: -webkit-left;">, typically using some form of frequency or wave division multiplexing. </span></span></div>
<span style="text-align: -webkit-left;"><span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3;"> Next, Dr Dayang also discuss with us about the</span> <span style="background-color: yellow;">infrared technology</span><span style="background-color: #cfe2f3; color: red;"> </span><span style="background-color: #cfe2f3;">^^</span></span></span><br />
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; color: #333333; line-height: 18px; text-align: left;">Infrared</span><span style="color: #333333; line-height: 18px; text-align: left;"><span style="background-color: #cfe2f3;"> technology allows computing devices to communicate via </span><span style="background-color: yellow;">short-range wireless signals</span><span style="background-color: #cfe2f3;">. With infrared, computers can transfer files and other digital data bidirectionally. The infrared transmission technology used in computers is similar to that used in consumer product remote control units.</span></span>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; color: #333333; line-height: 18px; text-align: left;">Computer infrared </span><span style="background-color: #cfe2f3;">network adapters</span><span style="color: #333333; line-height: 18px; text-align: left;"><span style="background-color: #cfe2f3;"> both transmit and receive data through ports on the rear or side of a device. Infrared adapters are installed in many laptops and handheld personal devices. In Microsoft Windows, infrared connections can be created through the same method as other local area network connections. Infrared networks were designed to </span><span style="background-color: yellow;">suppport direct two-computer connections only</span><span style="background-color: #cfe2f3;">, created temporarily as the need arises. However, extensions to infrared technology also support more than two computers and semi-permanent networks.</span></span>
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<span style="font-family: Times, 'Times New Roman', serif;"><span style="color: #333333; line-height: 18px; text-align: left;"><span style="background-color: #cfe2f3;">Infrared communications </span><span style="background-color: yellow;">span very short distances.</span><span style="background-color: #cfe2f3;"> Place two infrared devices within a few feet (no more than 5 meters) of each other when networking them. Unlike </span></span><span style="background-color: #cfe2f3;">Wi-Fi</span><span style="background-color: #cfe2f3; color: #333333; line-height: 18px; text-align: left;"> and </span><span style="background-color: #cfe2f3;">Bluetooth </span><span style="background-color: #cfe2f3; color: #333333; line-height: 18px; text-align: left;">technologies, infrared network signals </span><span style="background-color: yellow;"><span style="color: #333333; line-height: 18px; text-align: left;">can</span><span style="color: #333333; line-height: 18px; text-align: left;">not penetrate walls or other obstructions</span></span><span style="background-color: #cfe2f3; color: #333333; line-height: 18px; text-align: left;"> and work only in the direct "line of sight."</span>
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<span style="color: #333333; font-family: Times, 'Times New Roman', serif;"><span style="background-color: #cfe2f3; line-height: 18px;">Ok, that's all from me this week. Until then, we will meet again ^^.</span></span></div>
<br />Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com0tag:blogger.com,1999:blog-1486257860083054223.post-47211956849143083382012-05-05T22:36:00.001-07:002012-05-05T22:40:20.496-07:00Week 6- Unbounded media and wireless technology<br />
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<span style="background-color: #cfe2f3; font-family: 'Times New Roman', serif; font-size: 13.5pt;">T</span><span style="background-color: #cfe2f3; font-family: 'Times New Roman', serif; font-size: 13.5pt;">oday, Dr. Dayang taught
us about unbounded/unguided media and wireless technology.</span></div>
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<u><span style="background-color: #cfe2f3; color: red; font-family: 'Times New Roman', serif; font-size: 12pt;">Unbounded
media<o:p></o:p></span></u></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: Symbol; font-size: 10pt;">·<span style="font-family: 'Times New Roman'; font-size: 7pt;">
</span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">No physical connection is required.</span><b><span style="font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></b></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: Symbol; font-size: 10pt;">·<span style="font-family: 'Times New Roman'; font-size: 7pt;">
</span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">Space or air is the transmission
medium for electromagnetic waves.</span><b><span style="font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></b></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: Symbol; font-size: 10pt;">·<span style="font-family: 'Times New Roman'; font-size: 7pt;">
</span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">Source and destination can be static
or mobile.</span><b><span style="font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></b></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: Symbol; font-size: 10pt;">·<span style="font-family: 'Times New Roman'; font-size: 7pt;">
</span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">Broad spectrum from low to high
bandwidth is available.</span><b><span style="font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></b></span></div>
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</span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">Can be quickly implemented<b>.</b></span><b><span style="font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></b></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">After that , Dr. Dayang asked
us to find the information about radio frequency (RF) and cellular phone.</span><b><span style="font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></b></span></div>
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<u><span style="background-color: #cfe2f3; color: red; font-family: 'Times New Roman', serif; font-size: 12pt;">radio frequency (RF)<o:p></o:p></span></u></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: Times, 'Times New Roman', serif;"><strong><span style="border-bottom-color: windowtext; border-bottom-style: none; border-bottom-width: 1pt; border-image: initial; border-left-color: windowtext; border-left-style: none; border-left-width: 1pt; border-right-color: windowtext; border-right-style: none; border-right-width: 1pt; border-top-color: windowtext; border-top-style: none; border-top-width: 1pt; font-size: 12pt; font-weight: normal; padding-bottom: 0cm; padding-left: 0cm; padding-right: 0cm; padding-top: 0cm;">R</span></strong><em><span style="border-bottom-color: windowtext; border-bottom-style: none; border-bottom-width: 1pt; border-image: initial; border-left-color: windowtext; border-left-style: none; border-left-width: 1pt; border-right-color: windowtext; border-right-style: none; border-right-width: 1pt; border-top-color: windowtext; border-top-style: none; border-top-width: 1pt; font-size: 12pt; padding-bottom: 0cm; padding-left: 0cm; padding-right: 0cm; padding-top: 0cm;">adio</span></em><span class="apple-converted-space"><i><span style="border-bottom-color: windowtext; border-bottom-style: none; border-bottom-width: 1pt; border-image: initial; border-left-color: windowtext; border-left-style: none; border-left-width: 1pt; border-right-color: windowtext; border-right-style: none; border-right-width: 1pt; border-top-color: windowtext; border-top-style: none; border-top-width: 1pt; font-size: 12pt; padding-bottom: 0cm; padding-left: 0cm; padding-right: 0cm; padding-top: 0cm;"> </span></i></span><strong style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; background-position: initial initial; background-repeat: initial initial; border-color: initial; border-image: initial; border-style: initial; outline-color: initial; outline-style: initial; outline-width: 0px;"><span style="border-bottom-color: windowtext; border-bottom-style: none; border-bottom-width: 1pt; border-image: initial; border-left-color: windowtext; border-left-style: none; border-left-width: 1pt; border-right-color: windowtext; border-right-style: none; border-right-width: 1pt; border-top-color: windowtext; border-top-style: none; border-top-width: 1pt; font-size: 12pt; font-weight: normal; padding-bottom: 0cm; padding-left: 0cm; padding-right: 0cm; padding-top: 0cm;">f</span></strong><em><span style="border-bottom-color: windowtext; border-bottom-style: none; border-bottom-width: 1pt; border-image: initial; border-left-color: windowtext; border-left-style: none; border-left-width: 1pt; border-right-color: windowtext; border-right-style: none; border-right-width: 1pt; border-top-color: windowtext; border-top-style: none; border-top-width: 1pt; font-size: 12pt; padding-bottom: 0cm; padding-left: 0cm; padding-right: 0cm; padding-top: 0cm;">requency</span></em></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;"> is any frequency
within the electromagnetic spectrum associated with radio wave propagation.
When an RF current is supplied to an antenna, an electromagnetic field is
created that then is able to propagate through space. Many <span style="color: red; font-size: 12pt;">wireless
technologies </span><span style="font-size: 12pt;">are based on RF field propagation.</span><o:p></o:p></span></span></div>
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<a href="http://1.bp.blogspot.com/-Ly0I6lfSAys/T6YDM-D4sCI/AAAAAAAAAGI/KDIRq__emII/s1600/stock-illustration-15267963-flashy-radio-tower.jpg" imageanchor="1" style="background-color: #cfe2f3; margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://1.bp.blogspot.com/-Ly0I6lfSAys/T6YDM-D4sCI/AAAAAAAAAGI/KDIRq__emII/s320/stock-illustration-15267963-flashy-radio-tower.jpg" width="283" /></a></div>
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<span style="background-color: #cfe2f3;"><u><span style="color: red; font-family: 'Times New Roman', serif; font-size: 12pt;">cellular phone</span></u><b><u><span style="color: red; font-family: 'Times New Roman', serif; font-size: 18pt;"><o:p></o:p></span></u></b></span></div>
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<span style="background-color: #cfe2f3;"><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; font-family: 'Times New Roman', serif; font-size: 12pt;">A<span class="apple-converted-space"> </span></span>mobile phone<span class="apple-converted-space"><span style="text-align: -webkit-auto;"> </span>(also known as a<span class="apple-converted-space"> </span></span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: red; font-family: 'Times New Roman', serif; font-size: 12pt;">cellular phone</span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; font-family: 'Times New Roman', serif; font-size: 12pt;"><span style="text-align: -webkit-auto;">,<span class="apple-converted-space"> </span></span>cell phone<span class="apple-converted-space"><span style="text-align: -webkit-auto;"> </span>and a<span class="apple-converted-space"> </span></span>hand phone<span style="text-align: -webkit-auto;">) is a device that </span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; font-size: 12pt;">can make and
receive<span class="apple-converted-space"> </span></span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;"><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext; text-decoration: none;">te</span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext;">lephone call</span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext; text-decoration: none;">s</span><span class="apple-converted-space"><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;"><span style="text-align: -webkit-auto;"> </span></span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;">over a<span class="apple-converted-space"> </span></span></span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext; text-decoration: none;">radio link</span><span style="text-align: -webkit-auto;"> <span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;">whilst moving
around a wide geographic area. It does so by connecting to a<span class="apple-converted-space"> </span></span></span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext; text-decoration: none;">cellular network</span><span class="apple-converted-space"><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;"><span style="text-align: -webkit-auto;"> </span></span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;">provided by a<span class="apple-converted-space"> </span></span></span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext; text-decoration: none;">mobile phone operator</span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;"><span style="text-align: -webkit-auto;">, allowing access
to the</span> </span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; color: windowtext; text-decoration: none;">public telephone network</span><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial;"><span style="text-align: -webkit-auto;">.</span></span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;"><o:p></o:p></span></span></div>
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<a href="http://2.bp.blogspot.com/-oxMt81TOWlw/T6YEFJ0B7UI/AAAAAAAAAGQ/70LSG7-TUbs/s1600/mobile_phone_collage.jpg" imageanchor="1" style="background-color: #cfe2f3; margin-left: 1em; margin-right: 1em;"><img border="0" height="252" src="http://2.bp.blogspot.com/-oxMt81TOWlw/T6YEFJ0B7UI/AAAAAAAAAGQ/70LSG7-TUbs/s400/mobile_phone_collage.jpg" width="400" /></a></div>
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<u><span style="background-attachment: initial; background-clip: initial; background-color: #cfe2f3; background-image: initial; background-origin: initial; color: red; font-family: 'Times New Roman', serif; font-size: 12pt;">Wireless technology</span></u></div>
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<span style="background-color: #cfe2f3;"><span style="background-attachment: initial; background-clip: initial; background-image: initial; background-origin: initial; font-family: 'Times New Roman', serif; font-size: 12pt;">Next,we learn about <span style="color: red;">wireless technology</span>. </span><span style="font-size: 10.5pt; line-height: 16px; text-align: center;"><span style="font-family: Times, 'Times New Roman', serif;">Wireless telecommunications is the transfer of information between two or more points that are not physically connected. Distances can be short, such as a few metres for television remote control, or as far as thousands or even millions of kilometres for deep-space radio communications.</span></span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;">It is a term used for mobile IT equipment. It is encompasses cellular phones, personal digital assistants (PDA’s) and wireless wiring. Other examples of wireless technology include GPA units, garage door openers and or garage door, wireless computer mice and keyboards, satellite television and cordless telephones. </span><span style="font-family: 'Times New Roman', serif; font-size: 12pt;"> </span></span></div>
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<a href="http://2.bp.blogspot.com/-ekiGkKZ18EY/T6YLiQm0AiI/AAAAAAAAAGc/Nr9JOt2XUWY/s1600/bluetooth-wireless-technology.jpg" imageanchor="1" style="background-color: #cfe2f3; margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" height="212" src="http://2.bp.blogspot.com/-ekiGkKZ18EY/T6YLiQm0AiI/AAAAAAAAAGc/Nr9JOt2XUWY/s320/bluetooth-wireless-technology.jpg" width="320" /></a></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 14px; line-height: 15.75pt;">Here is a table to </span><span style="font-size: 14px; line-height: 21px;">compare</span><span style="font-size: 14px; line-height: 15.75pt;"> and contrast between 3G and 4G wireless technology.</span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="color: red; font-size: 10.5pt;">3G</span><span style="color: #666666; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3;"><span style="color: red; font-size: 10.5pt;"><span style="font-family: Times, 'Times New Roman', serif;">4G</span></span><span style="color: #666666; font-family: 'Crafty Girls', serif; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="color: red; font-size: 10.5pt;">Technology Used</span><span style="color: #666666; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">WDM.A</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">EVDO</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">HSP</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">LTF</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">Wi Max</span><span style="color: #666666; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="color: red; font-size: 10.5pt;">Speed</span><span style="color: #666666; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">600 KB per sec</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">1.4 MB per sec
(downlink)</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
<div align="center" class="MsoNormal" style="line-height: 15.75pt; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: center;">
<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">5.8 MB per sec (uplink)</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">10 times faster than 3G</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">3.6 MB per sec
(downlink)</span><span style="color: #666666; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3;"><span style="color: red; font-size: 10.5pt;"><span style="font-family: Times, 'Times New Roman', serif;">Switching Type</span></span><span style="color: #666666; font-family: 'Crafty Girls', serif; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif;"><span style="font-size: 10.5pt;">Circuit switching</span><span style="font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-size: 10.5pt;"><span style="font-family: Times, 'Times New Roman', serif;">Packet switching</span></span><span style="color: #666666; font-family: 'Crafty Girls', serif; font-size: 10.5pt;"><o:p></o:p></span></span></div>
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<span style="background-color: #cfe2f3;">As always, here is a video for all of you to enjoy. Thanks for reading the post ^^.</span></div>
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<span style="font-family: 'Times New Roman', serif; font-size: 12pt;"><span style="font-size: 12pt;"><br /></span></span></div>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com0tag:blogger.com,1999:blog-1486257860083054223.post-31204188523438037132012-04-26T23:23:00.002-07:002012-04-26T23:23:26.382-07:00WEEK 5- Cabling<br />
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<h3>
<span style="font-size: large; font-weight: normal;"><span style="color: red;">Cable</span> is the medium through which information usually moves<br />from one network device to another. Several types of cable are<br />commonly used with LANs.In some cases,a network will utilize only one type of cable, other networks will use a variety of cable types.There are four types of cables namely :</span></h3>
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<li><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"> Unshielded Twiested Pair (UTP) </span></li>
<li><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"> <span style="background-color: white;">Shielded Twisted Pair (STP) </span></span></li>
<li><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="background-color: white;"> </span><span style="background-color: white;">Coaxial Cable</span></span></li>
<li><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="background-color: white;"> </span><span style="background-color: white;">Fiber Optic Cable</span></span></li>
<li><span style="background-color: white;"><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"> Wireless LANs</span></span></li>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><b> <u>Unshielded Twiested Pair (UTP)</u></b></span>
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<a href="http://3.bp.blogspot.com/-f7-bG7-bk7k/T5oxUrtSgeI/AAAAAAAAAFU/aRpL1_eyZQY/s1600/images.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="191" src="http://3.bp.blogspot.com/-f7-bG7-bk7k/T5oxUrtSgeI/AAAAAAAAAFU/aRpL1_eyZQY/s200/images.jpg" width="200" /></a></div>
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<li style="line-height: 20px;"><span style="background-color: white; font-family: Times, 'Times New Roman', serif; font-size: large;"> four pairs of wires inside the jacket</span></li>
<li><span style="background-color: white; font-family: Times, 'Times New Roman', serif; font-size: large; line-height: 20px;"><span style="font-family: 'Times New Roman'; font-size: small;"> </span>each pair is twisted with different twist per inch to help eliminate <span style="font-size: small;"> </span></span><span style="background-color: white; font-family: Times, 'Times New Roman', serif; font-size: large; line-height: 20px;">interference from adjacent pairs and other electrical devices.</span></li>
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<b style="background-color: white; font-family: Times, 'Times New Roman', serif; font-size: x-large; line-height: 20px;"><u> <span style="background-color: white;">Shielded Twisted Pair (STP) </span></u></b><br />
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<a href="http://1.bp.blogspot.com/-LcU8zMmkDX4/T5o0B-qLDGI/AAAAAAAAAFg/-kxWZvF7QC4/s1600/ceble+STP.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="139" src="http://1.bp.blogspot.com/-LcU8zMmkDX4/T5o0B-qLDGI/AAAAAAAAAFg/-kxWZvF7QC4/s320/ceble+STP.jpg" width="320" /></a></div>
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<li><span style="background-color: white; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;"><span style="font-size: large;"><span style="color: #333333;"> </span>consists of two individual wires wrapped in a foil shielding to help provide a more reliable data communication. </span></span></li>
<li><span style="font-size: large;"><span style="background-color: white; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;">suitable for environments with electrical </span><span style="background-color: white; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;">interference but the extra shielding can make the cables quite bulky. </span></span></li>
<li><span style="background-color: white; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;"><span style="font-size: large;">often used on networks using Token Ring topology.</span></span></li>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large; line-height: 20px; text-align: left;"><b><u>Coaxial Cable</u></b></span>
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<a href="http://4.bp.blogspot.com/-rE68lPnTdCA/T5o2Eq1HfTI/AAAAAAAAAFo/7S8OZjp1txk/s1600/Coaxial-Cable-RG11-.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="http://4.bp.blogspot.com/-rE68lPnTdCA/T5o2Eq1HfTI/AAAAAAAAAFo/7S8OZjp1txk/s320/Coaxial-Cable-RG11-.jpg" width="320" /></a></div>
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<li><span style="background-color: white; color: #333333; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;"><span style="font-size: large;">Coaxial cabling has a single copper conductor at its center. </span></span></li>
<li><span style="background-color: white; color: #333333; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;"><span style="font-size: large;">A plastic layer provides insulation between the center conductor and a braided metal shield. </span></span></li>
<li><span style="background-color: white; color: #333333; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;"><span style="font-size: large;">The metal shield helps to block any outside interference from fluorescent lights, motors, and other computers.</span></span></li>
<li><span style="font-size: large;"><span style="background-color: white; color: #333333; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;">The most common type of connector </span><span style="background-color: white; color: #333333; font-family: Philosopher; line-height: 27px; text-align: -webkit-auto;">used with coaxial cables is the Bayone-Neill-Concelman (BNC) connector. </span></span></li>
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<a href="http://1.bp.blogspot.com/-0SeozEb5mko/T5o3lu0kt8I/AAAAAAAAAFw/r36K0_dhH1I/s1600/image6.png" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="320" src="http://1.bp.blogspot.com/-0SeozEb5mko/T5o3lu0kt8I/AAAAAAAAAFw/r36K0_dhH1I/s320/image6.png" width="299" /></a></div>
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<li><span style="text-align: -webkit-auto;"><span style="color: #333333; font-family: Philosopher; font-size: large;"><span style="line-height: 27px;">Fiber Optic Cable consists of a center glass core surrounded by several layers of protective materials and transmits light rather than electronic signals eliminating the problem of electrical interference. </span></span></span></li>
<li><span style="text-align: -webkit-auto;"><span style="color: #333333; font-family: Philosopher; font-size: large;"><span style="line-height: 27px;">Fiber Optic Cable is ideal for certain environments that contain a large amount of electrical interference. </span></span></span></li>
<li><span style="font-size: large;"><span style="text-align: -webkit-auto;"><span style="color: #333333; font-family: Philosopher;"><span style="line-height: 27px;">It is able to transmit signals over much longer distances than coaxial and twisted pair.</span></span></span>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><u><span style="line-height: 20px;">Summary of Ethernet cabling </span></u></span><br />
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="color: red;">10BaseT</span> : Unshielded Twisted Pair : 100 meters</span></div>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="color: red;">10Base2</span> : Thin Coaxial : 185 meters</span></div>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="color: red;">10Base5</span> : Thick Coaxial : 500 meters</span></div>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="line-height: 20px;"><span style="color: red;">10BaseF</span> : Fiber Optic : 2000 meters'</span></span><br />
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="line-height: 20px;"><u>Cable and typology</u> </span></span><br />
<span style="background-color: white; font-family: Times, 'Times New Roman', serif; line-height: 20px;"><span style="font-size: large;"><br /></span></span><br />
<span style="font-size: large;"><span style="background-color: white; font-family: Times, 'Times New Roman', serif; line-height: 20px;"> </span><span style="background-color: white; font-family: Times, 'Times New Roman', serif;"><span style="line-height: 20px;"> </span></span></span><span style="background-color: white; line-height: 20px;"><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="color: red;">Linear Bus</span> : Coax, twisted pair, Fiber : Ethernet, Local talk</span></span><br />
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"> <span style="color: red;">Star</span> : Twisted pair, fiber : Ethernet, Local talk</span></div>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"> <span style="color: red;">Star-wired Ring</span> : Twisted pair : Token ring</span></div>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large; line-height: 20px;"> <span style="color: red;">Tree</span> : Coax, twisted pair, fiber ; </span><span style="background-color: white; line-height: 20px;"><span style="font-family: Times, 'Times New Roman', serif; font-size: large;">Ethernet</span></span></div>
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<span style="background-color: white;"><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="line-height: 20px;">Ok, that's all from me today, thanks for visiting ^^</span></span></span></div>
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</div>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com0tag:blogger.com,1999:blog-1486257860083054223.post-92171813577377332802012-04-07T09:56:00.001-07:002012-04-07T09:57:45.528-07:00Week 4- Typology, Protocol and Architecture<span style="background-color: #d0e0e3; font-size: large;">Today, we learn about typology, protocol and architecture. <span style="color: red;"><b>Typology</b> </span>can be classified into two; </span><br />
<span style="font-size: large;"><span style="background-color: #d0e0e3; color: red;">Physical and Logical typology.</span></span><br />
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<span style="background-color: #d0e0e3;"><span style="color: red; font-size: large;"><span style="font-family: Times, 'Times New Roman', serif;">Physical Typology-</span> </span><span style="font-size: large;">mapping of links and notes into a geometrical shape.</span></span><br />
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<span style="background-color: #d0e0e3; font-size: large;"><span style="color: red;">Logical Typology</span>- mapping of the flow of data.</span><br />
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<span style="background-color: #d0e0e3; font-size: large;">Physical typology can be classified into five types</span><br />
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<li><span style="background-color: #d0e0e3; font-size: large;">linear bus</span></li>
<li><span style="background-color: #d0e0e3; font-size: large;">ring</span></li>
<li><span style="background-color: #d0e0e3; font-size: large;">star</span></li>
<li><span style="background-color: #d0e0e3;"><span style="font-size: large;">star -wired ring</span><span style="font-size: large;"> </span></span></li>
<li><span style="background-color: #d0e0e3; font-size: large;">tree</span></li>
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<span style="background-color: #d0e0e3; font-size: large;">Linear bus typology consist of a main cable and terminator at both end. All notes is connected to the main cable. Linear bus typology is easy to be connected and need less wire but may the whole system may malfunction if the main cable is broken. <span style="color: red;">Ethernet </span>and <span style="color: red;">local talk</span> uses linear bus typology.</span></div>
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<span style="background-color: #d0e0e3; font-size: large;">Ring typology is similar to linear bus in many aspects. The only difference is that bus typology do not have terminator as <span style="color: red;">all notes is interconnected with each other</span>.<span style="color: red;"> </span></span></div>
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<span style="background-color: #d0e0e3;"><span style="font-size: large;">Star typology is designed so that each nodes is connected to a hub/concentrater</span>. <span style="color: red; font-size: large;">Ethernet </span><span style="font-size: large;">and </span><span style="color: red; font-size: large;">local talk</span><span style="font-size: large;"> uses linear bus typology</span> .<span style="font-size: large;"> Star typology is easy to add new nodes and will not malfunction if one of the nodes breaks down. However, it need more cable length and cost more compare to linear bus. </span></span></div>
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<span style="background-color: #d0e0e3; font-size: large;">Star-wired is externally same as star typology. Internally, the<span style="color: red;"> MAU (multiststion access unit)</span> allows the information to pass from a device to a ring or circle. The <span style="color: red;">Token Ring</span> uses star- wired typology.</span></div>
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<span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="text-align: justify;"><span style="background-color: #d0e0e3; line-height: 24px;">A tree topology combines characteristics of linear bus and star topologies. It consists of groups of <span style="color: red;">star-configured workstations</span> connected to a<span style="color: red;"> linear bus</span> backbone cable. Tree typology allows <span style="color: red;">point to point wiring</span> for each nodes but the overall length of each segment is <span style="color: red;">limited by the types of cable used.</span> </span></span></span></div>
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<span style="background-color: #d0e0e3; font-family: Times, 'Times New Roman', serif; font-size: large;">In this lesson, we also learn about protocols. <b><span style="color: red;">Protocols </span></b>is a set of rules that governs the communication the computers in a network. It can be divided into</span></div>
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<li><span style="background-color: #d0e0e3; font-family: Times, 'Times New Roman', serif; font-size: large;">Ethernet</span></li>
<li><span style="background-color: #d0e0e3; font-family: Times, 'Times New Roman', serif; font-size: large;"> L<span style="line-height: 24px; text-align: justify; text-indent: -18pt;">ocaltalk</span></span></li>
<li><span style="line-height: 24px; text-align: justify; text-indent: -18pt;"><span style="background-color: #d0e0e3; font-family: Times, 'Times New Roman', serif; font-size: large;">Token Ring</span></span></li>
<li><span style="background-color: #d0e0e3; font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="line-height: 24px; text-align: justify; text-indent: -18pt;"><span style="line-height: normal;"> </span></span><span style="line-height: 24px; text-align: justify; text-indent: -18pt;">Fiber Distributed Data Interface (</span><span style="line-height: 24px; text-align: justify;">FDDI )</span></span></li>
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<span style="background-color: #d0e0e3;"><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="line-height: 24px;">We also learn about the types of </span></span><span style="font-size: large; text-align: -webkit-auto;"><span style="color: red;"><b>architecture:</b></span></span></span></div>
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<li><span style="background-color: #d0e0e3; font-size: large;">Peer to peer </span></li>
<li><span style="background-color: #d0e0e3; font-size: large;">client/server</span></li>
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<span style="background-color: #d0e0e3; font-size: large;">In <span style="color: red;">peer to peer</span>, all computers are considered <span style="color: red;">equal</span> and have the same tendency to share information . Peer to peer network lacks security as there is no central computer to control the network.</span></div>
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<span style="background-color: #d0e0e3; font-size: large;">In <span style="color: red;">client/ server network</span>, there are a <span style="color: red;">central network</span> that governs the transfer of data between the computers. The server is the heart of the system , providing security and access to information. </span></div>
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<span style="background-color: #d0e0e3;"><span style="font-size: large;">Lastly, our homework of the day is to find out the definition of Asynchronous Transfer Mode (ATM) . <span style="font-family: Times, 'Times New Roman', serif;">It </span></span><span style="font-family: Times, 'Times New Roman', serif; font-size: large;"><span style="line-height: 19px;">encodes data into <span style="color: red;">small,</span> <span style="color: red;">fixed-sized </span></span><i style="line-height: 19px;"><span style="color: red;">cells</span>.</i><span style="line-height: 19px;"> This differs from approaches such as the </span><a href="http://en.wikipedia.org/wiki/Internet_Protocol" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; line-height: 19px; text-decoration: none;" title="Internet Protocol"><span style="color: black;">Internet Protocol</span></a><span style="line-height: 19px;"> or </span><a href="http://en.wikipedia.org/wiki/Ethernet" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; line-height: 19px; text-decoration: none;" title="Ethernet"><span style="color: black;">Ethernet</span></a><span style="line-height: 19px;"> that use variable sized </span><i style="line-height: 19px;">packets</i><span style="line-height: 19px;"> or </span><i style="line-height: 19px;"><a href="http://en.wikipedia.org/wiki/Frame_Relay" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; text-decoration: none;" title="Frame Relay"><span style="color: black;">frames</span></a>.</i><span style="line-height: 19px;"> </span> </span></span></div>
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<a href="http://1.bp.blogspot.com/-wlM8amAdEYc/T4BvoMaoFeI/AAAAAAAAAFE/-nVJrfkaH-4/s1600/winsock2otherprotocol080.png" imageanchor="1" style="background-color: #d0e0e3; margin-left: 1em; margin-right: 1em;"><img border="0" height="152" src="http://1.bp.blogspot.com/-wlM8amAdEYc/T4BvoMaoFeI/AAAAAAAAAFE/-nVJrfkaH-4/s320/winsock2otherprotocol080.png" width="320" /></a></div>
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<span style="background-color: #d0e0e3; font-size: large;">That's all from me this lesson. Thanks 4 spending time to read it ^^</span></div>
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<span style="font-size: large;"> </span></div>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com0tag:blogger.com,1999:blog-1486257860083054223.post-40290527303096734952012-03-22T11:11:00.002-07:002012-03-22T11:13:09.135-07:00Week three- Networking <span style="font-family: inherit; font-size: large;"><span style="background-color: #cfe2f3; color: #666666;">Today is week 3 of the class and today we learn about</span><span style="background-color: #cfe2f3; color: #666666;"> </span><span style="background-color: #cfe2f3;"><span style="color: red;"><b>networking</b></span></span><span style="background-color: #cfe2f3; color: #666666;">. ^^</span></span><br />
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<span style="background-color: #cfe2f3; font-size: large;">Computer network is:</span><br />
<span style="background-color: #cfe2f3; font-family: Times, 'Times New Roman', serif; font-size: large;">- A
collection of computers and other hardware devices that are <span style="color: red;">connected together</span>
to share hardware, software, and data as well as to <span style="color: red;">communicate with one
another</span>.</span><br />
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<span style="background-color: #cfe2f3; font-size: large;">A <span style="color: red;">basic network</span> connects 2 computer together by a cable to exchange data and information while a<span style="color: red;"> LAN</span>, allows the sharing of data and devices such as modems and printer.</span></div>
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<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">–Types
of LAN based on geographic coverage.</span></div>
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<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">•<span style="color: red;">LAN</span> –
Local Area Network</span></div>
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<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">•<span style="color: red;">WAN</span> -
Wide Area Network</span></div>
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<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">•<span style="color: red;">MAN</span> -
Metropolitan Area Network</span></div>
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<span style="background-color: #cfe2f3; font-size: large;">computer network can be categorized according to three properties:</span></div>
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<li><span style="background-color: #cfe2f3; font-size: large;">typology</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">protocol</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">architecture </span></li>
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<span style="background-color: #cfe2f3; font-size: large;"><br /><b style="line-height: 19px;"><span style="color: red; font-family: inherit;">Network topology</span></b><span style="line-height: 19px;"><span style="font-family: sans-serif;"> </span><span style="font-family: inherit;">is the layout pattern of interconnections of the various elements (links, notes</span></span><span style="font-family: inherit;"><span style="line-height: 19px;">) of a computer network. It is the </span></span><span style="line-height: 19px;">geometrical arrangement of the network. The picture below show the different arrangement of the network.</span></span><br />
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<span style="background-color: #cfe2f3;"><b style="color: #333333; font-family: verdana; font-size: 12px; font-weight: bold; line-height: 18px;"> </b><span style="font-family: inherit; font-size: large;"><span style="line-height: 18px;">A </span><b style="font-weight: bold; line-height: 18px;"><span style="color: red;">network protocol</span></b><span style="line-height: 18px;"><span style="color: red;"> </span>defines rules and conventions for communication between network devices.</span> </span></span></div>
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<span style="background-color: #cfe2f3; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-size: large; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">The most common network protocols are<span style="color: #4d4d4d;">:</span></span></div>
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<li style="border-bottom-style: none; border-bottom-width: 0px; border-color: initial; border-color: initial; border-image: initial; border-left-style: none; border-left-width: 0px; border-right-style: none; border-right-width: 0px; border-style: initial; border-top-style: none; border-top-width: 0px; border-width: initial; margin-left: 20px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: #cfe2f3; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-size: large; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Local Talk</span></li>
<li style="border-bottom-style: none; border-bottom-width: 0px; border-color: initial; border-color: initial; border-image: initial; border-left-style: none; border-left-width: 0px; border-right-style: none; border-right-width: 0px; border-style: initial; border-top-style: none; border-top-width: 0px; border-width: initial; margin-left: 20px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: #cfe2f3; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-size: large; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">Token Ring</span></li>
<li style="border-bottom-style: none; border-bottom-width: 0px; border-color: initial; border-color: initial; border-image: initial; border-left-style: none; border-left-width: 0px; border-right-style: none; border-right-width: 0px; border-style: initial; border-top-style: none; border-top-width: 0px; border-width: initial; margin-left: 20px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: #cfe2f3; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-size: large; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">FDDI</span></li>
<li style="border-bottom-style: none; border-bottom-width: 0px; border-color: initial; border-color: initial; border-image: initial; border-left-style: none; border-left-width: 0px; border-right-style: none; border-right-width: 0px; border-style: initial; border-top-style: none; border-top-width: 0px; border-width: initial; margin-left: 20px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;"><span style="background-color: #cfe2f3; border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; font-family: inherit; font-size: large; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">ATM</span></li>
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<span style="font-size: large; line-height: 14px;"><span style="background-color: #cfe2f3; font-family: inherit;">The follow is some common-used network symbols to draw different kinds of network protocols.</span></span><br />
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<span style="background-color: #cfe2f3;"><span style="font-family: inherit;"><br /></span><a href="http://www.edrawsoft.com/images/network/Network-Protocols.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="Types of Network Protocols" border="0" height="267" src="http://www.edrawsoft.com/images/network/Network-Protocols.png" style="border-bottom-width: 0px; border-color: initial; border-image: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="400" /></a></span></div>
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<span style="background-color: #cfe2f3; font-size: large;"><span style="font-family: inherit;">A</span><span style="color: red; font-family: inherit;"><b> network architecture</b></span><span style="font-family: inherit;"> is the </span><span style="color: #222222; font-family: inherit;"><span style="line-height: 15px;">specification of design principles (including data formats and procedures) for creating a network configuration of data processors. Two most </span></span><span style="line-height: 15px;"><span style="color: #222222;">common network are </span><span style="color: red;">peer- to- peer</span><span style="color: #222222;"> and </span><span style="color: red;">server/client</span><span style="color: #222222;"> network</span></span><span style="color: #222222; font-family: inherit;"><span style="line-height: 15px;"> </span></span></span></div>
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<tr><td style="text-align: center;"><a href="http://3.bp.blogspot.com/-YmyUEeqwn7o/T2tgCermrRI/AAAAAAAAAD0/ySIguSs_6vU/s1600/client_server.jpg" imageanchor="1" style="background-color: #cfe2f3; margin-left: auto; margin-right: auto;"><img border="0" height="302" src="http://3.bp.blogspot.com/-YmyUEeqwn7o/T2tgCermrRI/AAAAAAAAAD0/ySIguSs_6vU/s320/client_server.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="background-color: #cfe2f3;"><span style="font-size: large; line-height: 15px; text-align: left;">server/client</span><span style="color: #cc0000;"> </span></span></td></tr>
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<a href="http://2.bp.blogspot.com/-Oh2wDhdeH-w/T2thM5AVLcI/AAAAAAAAAD8/2TqoDpR-zyA/s1600/Peer-to-peer+network.png" imageanchor="1" style="background-color: #cfe2f3; margin-left: 1em; margin-right: 1em;"><img border="0" src="http://2.bp.blogspot.com/-Oh2wDhdeH-w/T2thM5AVLcI/AAAAAAAAAD8/2TqoDpR-zyA/s1600/Peer-to-peer+network.png" /></a></div>
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<span style="background-color: #cfe2f3;"><span style="font-size: large;">There are two types of transmission media; <span style="color: red;">bounded</span> and <span style="color: red;">unbounded</span>.</span> </span></div>
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<span style="background-color: #cfe2f3;"><span style="font-size: 24pt;"><span style="font-size: 100%;"> • </span></span><span style="font-family: inherit; font-size: large;"><u>Bounded
Media </u> • <u>Unbounded
Media</u>
(air or a vacuum)</span></span></div>
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<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">- Twisted pair wire - AM and FM radio</span></div>
<div style="direction: ltr; language: en-MY; margin-bottom: 0pt; margin-left: .81in; margin-top: 5.76pt; mso-line-break-override: restrictions; punctuation-wrap: simple; text-align: left; text-indent: -.31in; unicode-bidi: embed; vertical-align: baseline;">
<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">- Co-axial cable - TV broadcasting</span></div>
<div style="direction: ltr; language: en-MY; margin-bottom: 0pt; margin-left: .81in; margin-top: 5.76pt; mso-line-break-override: restrictions; punctuation-wrap: simple; text-align: left; text-indent: -.31in; unicode-bidi: embed; vertical-align: baseline;">
<span style="background-color: #cfe2f3; font-family: inherit; font-size: large;">- Fiber optic cables - Satellite communication</span></div>
<div style="direction: ltr; language: en-MY; margin-bottom: 0pt; margin-left: .81in; margin-top: 5.76pt; mso-line-break-override: restrictions; punctuation-wrap: simple; text-align: left; text-indent: -.31in; unicode-bidi: embed; vertical-align: baseline;">
<span style="background-color: #cfe2f3; font-family: inherit; font-size: large; text-indent: -0.31in;">- Microwave radio</span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: inherit; font-size: large;">- Infrared signals</span><span style="font-family: Arial; font-size: 24pt;"> </span></span></div>
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<span style="background-color: #cfe2f3;"><span style="font-family: inherit; font-size: large;">- Below are</span><span style="font-family: Arial; font-size: x-large;"> </span><span style="font-size: large;"><span style="font-family: inherit;">some examples of <b><span style="color: red;">network </span></b></span><b><span style="color: red;">electronic</span></b><span style="font-family: inherit;"><b><span style="color: red;"> device</span></b> and</span></span></span></div>
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<span style="font-size: large;"><span style="background-color: #cfe2f3; font-family: inherit;">their properties:</span></span></div>
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<li><span style="background-color: #cfe2f3;"><span style="font-family: inherit; font-size: large; text-indent: -0.31in;"><span style="line-height: 19px; text-align: -webkit-auto;">A<span style="color: red;"> </span></span><b style="line-height: 19px; text-align: -webkit-auto;"><span style="color: red;">network bridge</span></b><span style="line-height: 19px; text-align: -webkit-auto;"><span style="color: red;"> </span>connects multiple </span><a href="http://en.wikipedia.org/wiki/Network_segment" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; line-height: 19px; text-align: -webkit-auto; text-decoration: none;" title="Network segment"><span style="color: black;">network segments</span></a><span style="line-height: 19px;">.</span></span><span style="line-height: 19px; text-align: -webkit-auto; text-indent: -0.31in;"><span style="font-family: inherit; font-size: large;">A bridge uses a forwarding database to send frames across network segments.</span></span></span></li>
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<span style="line-height: 19px;"><span style="background-color: #cfe2f3; font-size: xx-small;"><br /></span></span></div>
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<li><span style="line-height: 19px; text-align: -webkit-auto; text-indent: -0.31in;"><span style="background-color: #cfe2f3; font-family: inherit; font-size: large;"><span style="text-indent: 0px;">A </span><b style="text-indent: 0px;"><span style="color: red;">router</span></b><span style="text-indent: 0px;"> is a device that forwards </span><span style="color: black;"><a class="mw-redirect" href="http://en.wikipedia.org/wiki/Data_packet" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; text-decoration: none; text-indent: 0px;" title="Data packet"><span style="color: black;">data packets</span></a><span style="text-indent: 0px;"> between </span><a href="http://en.wikipedia.org/wiki/Computer_network" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; text-decoration: none; text-indent: 0px;" title="Computer network"><span style="color: black;">computer networks</span></a><span style="text-indent: 0px;">, creating an overlay </span><a class="mw-redirect" href="http://en.wikipedia.org/wiki/Internetwork" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; text-decoration: none; text-indent: 0px;" title="Internetwork"><span style="color: black;">internetwork</span></a></span><span style="text-indent: 0px;">. A router is connected to two or more data lines from different networks.</span></span></span></li>
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<li><span style="line-height: 19px; text-align: -webkit-auto; text-indent: -0.31in;"><span style="background-color: #cfe2f3; font-family: inherit; font-size: large;"><span style="text-indent: 0px;"> </span><b style="text-indent: 0px;"><span style="color: red;">hub</span></b><span style="text-indent: 0px;"><span style="color: red;"> </span>is a device for connecting multiple </span><span style="color: black;"><a href="http://en.wikipedia.org/wiki/Ethernet" style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; text-decoration: none; text-indent: 0px;" title="Ethernet"><span style="color: black;">Ethernet</span></a><span style="text-indent: 0px;"> devices together and making them act as a single network segment.</span></span></span></span></li>
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<li><span style="background-color: #cfe2f3; font-family: inherit; font-size: large;"><span style="line-height: 19px;"><b><span style="color: red;">gateway </span></b>i</span><span style="line-height: 19px;">s used to interfaced with other network</span><b style="line-height: 19px;">.</b><span style="line-height: 19px;">A gateway is </span><span style="line-height: 19px;">a network point that acts as an entrance to another </span><span style="background-attachment: initial; background-clip: initial; background-image: none; background-origin: initial; color: black; line-height: 19px; text-decoration: none;"><span style="color: black;">network</span>.</span></span></li>
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<span style="font-size: large;"><span style="background-color: #cfe2f3; line-height: 19px;">As usual, please enjoy the video regarding computer networking:</span></span></div>
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</div>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com0tag:blogger.com,1999:blog-1486257860083054223.post-89204732398653411202012-03-07T09:10:00.001-08:002012-03-07T09:55:58.777-08:00Week two- Data Communication<span style="background-color: #cfe2f3; font-size: large;">Today is week 2 of the class and today we learn about <b style="color: red;">data communication</b>. ^^</span><br />
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<span style="font-size: large;"><span style="background-color: #cfe2f3;">It is basically define as</span></span><br />
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<li><span style="background-color: #cfe2f3;"><span style="font-size: large;"><i><span style="color: red;">collection</span></i> and <i><span style="color: red;">distribution </span></i>of electronic information to and from remote facilities by means of electrical transmission </span><span style="font-size: large;">system.</span><span style="font-size: large;"> </span><span style="font-size: large;"> </span><span style="font-size: large;"> </span></span></li>
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<span style="background-color: #cfe2f3; font-size: large;">Some of the communication devises include telephones lines, satellites or coaxial cable</span><br />
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<span style="background-color: #cfe2f3; font-size: large;">Information need to be converted into signal understood by the media so that data can be transmitted. There are 2 types of signal : <span style="font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif;"><i><span style="color: red; font-weight: bold;">Analog </span>vs <span style="color: red;"><b>Digital</b></span></i></span></span><br />
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<a href="http://2.bp.blogspot.com/-2KbVXJXZ6BE/T1eRUDva39I/AAAAAAAAACk/QAEZhtBRpYY/s1600/digital-vs-analog.gif.scaled500.gif" imageanchor="1" style="background-color: #cfe2f3; margin-left: 1em; margin-right: 1em;"><img border="0" height="218" src="http://2.bp.blogspot.com/-2KbVXJXZ6BE/T1eRUDva39I/AAAAAAAAACk/QAEZhtBRpYY/s320/digital-vs-analog.gif.scaled500.gif" width="320" /></a></div>
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<span style="background-color: #cfe2f3; font-size: large;">Analog signal needs to be converted to digital signal of binary digit 0 and 1 as it is the language of computer. This process is called <span style="color: red;"><i>modulation</i> </span>while the reverse is called <span style="color: red;"><i>demodulation</i></span> </span><br />
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<span style="background-color: #cfe2f3; font-size: large;">Binary digit is the smallest unit of measurement in digital and it consist of 0 and 1.</span><br />
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<li><span style="background-color: #cfe2f3; font-size: large;">8 bits = 1 byte</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">1024 /1000 bytes = 1 kilobyte </span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">1000 kilobytes = 1 megabyte</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">1000 megabytes= 1 gigabyte</span></li>
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<span style="background-color: #cfe2f3;"><span style="font-size: large;"><b style="color: red;">Parallel transmission </b>is the transfer of data <i>simultaneously </i>while in <b style="color: red;">series transmission</b>, each bits is transfer after one another using the same line. For this reason, it is slower than parallel transmission. <i> </i><b style="color: red; font-style: italic;"> </b></span><span style="color: red; font-family: inherit; font-size: large;"><b> </b></span></span><br />
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<span style="background-color: #cfe2f3; font-size: large;">There are three types of data flow ; <i style="font-weight: bold;"><span style="color: red;">Simplex, Half - Duplex</span></i> and <i style="font-weight: bold;"><span style="color: red;">Full Duplex</span>. </i></span><br />
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<span style="font-size: large;"><i><u style="background-color: #cfe2f3;">Simplex</u></i></span><br />
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<li><span style="background-color: #cfe2f3; font-size: large;">transmission in <span style="color: red;">one direction</span> only</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">no interaction between both receiver and transmitter as their role is <span style="color: red;">fixed </span></span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">etc: TV, radio</span></li>
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<span style="font-size: large;"><i><u style="background-color: #cfe2f3;">Half- Duplex</u></i></span><br />
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<a href="http://4.bp.blogspot.com/-FP2wXNRerrc/T1ecVbd8RDI/AAAAAAAAAC8/wa_uKyiyZ-0/s1600/images+(3).jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><span style="background-color: #cfe2f3;"><img border="0" src="http://4.bp.blogspot.com/-FP2wXNRerrc/T1ecVbd8RDI/AAAAAAAAAC8/wa_uKyiyZ-0/s1600/images+(3).jpg" /></span></a></div>
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<li><span style="background-color: #cfe2f3; font-size: large;">Message can flow in 2 direction but <span style="color: red;"><i>never at the same time</i></span></span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">One station transmit info to another without interruption and the other station will respond after the transmission is complete.</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">etc: Walkie- talkie</span></li>
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<span style="font-size: large;"><i><u style="background-color: #cfe2f3;">Full- Duplex</u></i></span><br />
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<ul><a href="http://2.bp.blogspot.com/-AiRAXVl4Cdk/T1ec9KEnRnI/AAAAAAAAADE/wjKj7gLtQYc/s1600/STS.jpg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><span style="background-color: #cfe2f3;"><img border="0" height="180" src="http://2.bp.blogspot.com/-AiRAXVl4Cdk/T1ec9KEnRnI/AAAAAAAAADE/wjKj7gLtQYc/s200/STS.jpg" width="200" /></span></a>
<li><span style="background-color: #cfe2f3; font-size: large;">Both station can transmit and receive signal at the <span style="color: red;"><i>same time</i></span>. It is the most interactive way of communication among the three.</span></li>
<li><span style="background-color: #cfe2f3; font-size: large;">etc: telephone line, tele- conference </span></li>
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<span style="background-color: #cfe2f3; font-size: large;">well, i guess this is all from me for time being. Below is a video for you all to enjoy. Thank you and peace to the world ^^. </span><br />
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/b1i-ZrUogGs?feature=player_embedded' frameborder='0'></iframe></div>
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<span style="font-size: large;"><span style="color: red;"><i><br /></i></span></span>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com0tag:blogger.com,1999:blog-1486257860083054223.post-21458303846464257512012-02-29T08:59:00.000-08:002012-03-07T07:17:49.510-08:00Week one - Introduction to telecommunication<div class="separator" style="clear: both; text-align: center;">
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<span style="font-size: large; text-align: -webkit-auto;">Well, today is historical for me as I creates my own blog. To me, blogging is a completely new experience. There is two words to describe it , fun but time consuming. Maybe I am a perfect order person, so I spent long time designing my blog. Actually I want to voice my appreciation to my telecommunication lecturer, Dr Dayang cause she gives me the opportunity to try something new , which suits my adventures and exploring self and personality. By the way, my first impression of Dr Dayang is that she is friendly, fun and easy to be approached ^^.</span></div>
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<a href="http://3.bp.blogspot.com/-YRMz7GMK0GI/T05ShEvolvI/AAAAAAAAAB4/uDXnkzVavSI/s1600/a+(2).jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em; text-align: left;"><span style="color: black; font-size: large;"><img border="0" height="240" src="http://3.bp.blogspot.com/-YRMz7GMK0GI/T05ShEvolvI/AAAAAAAAAB4/uDXnkzVavSI/s320/a+(2).jpg" width="320" /></span></a></div>
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<span style="font-size: large;">Today is the introductory class of telecommunication. Before we starts the lesson, we are given individual and group assignment. My group choose to do the topic, " Search Engine". It is no strange topic for me as I, as most of the 90's kids, is obsessed with search engine such as yahoo and goggle. Even facebook is a search engine , where we search for our friend and interest. Well, today we learn about basic definition of telecommunication , its history and some communication model. What catches my attention is that communication is a 2 way interaction. To have an effective communication, we need to have a good media of interaction such as mediated or verbal communication. The most important thing is that the sender must grabs the attention of the receiver before getting him tuned on with the sender to enhance effective communication. In this aspect, getting feedback is an important aspect as the receiver must voice up their view so that the sender can know whether he/ she deliver the massage in an appropriate and good way. To sum up, communication is interactive, interesting and purposeful. By the way, creating blog is an interactive way of communication as we can reflect on our studies with our lecturer. </span></div>
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<span style="font-size: large;">Here is a funny video on history telecommunication . Enjoy ^^.</span></div>
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<br /></div>Adrian Tehhttp://www.blogger.com/profile/06710342454392239197noreply@blogger.com1